This is such a great story. A great combination of enemies-to-lovers, historical/murim setting, great art, strong plot, detailed characterisation, and realistic dialogue/relationship dynamics.
It's a rare linear love story that begins in childhood, and then follows the characters through their cute chubby child phase, their awkward teenagers puberty phase, the first love/spring phase, and then the badass proper adult phase where they are both capable men and choose to be each other's support.
The characterisation and main romance is excellent. Frenemies is a difficult dynamic to pull off, but the author nails it. They know so much about each other and butt heads so often when growing up, and the transition to lovers is convincingly layered and confusing. They don't just suddenly fall in love for no reason, nor is it a case of 'they were always in love and just didn't know it'.
The external plots and secondary characters are also detailed and engaging. There's plenty to be invested in even outside the romance plot. So much so that my only real complaint with this story is that the smut is overly abundant. I was more invested in the story than the sex scenes so I tended to skip over them as they just kept coming and coming.
Overall, this is fantastic. Such a great blend of tropes, and done really really well. Thoroughly enjoyed it.